| naeyc.org | The National Association for the Education of Young Children |
| ckanet.org | California Kindergarten Association |
| auburn.edu | Auburn University |
| cyfernet.org | Cyfernet |
| childswork.org | Childswork Learning Center, Inc. |
| cfc-efc.ca | Association of Early Childhood Educators, Newfoundland and Labrador |
| pdx.edu | Oregon Center for Career Development in Childhood Care and Education |
| cdr.org | Child Development Resources |
| cdcheadstart.org | Child Development Council of Franklin County |
| neu.edu | Global Early Intervention Network (GEIN) |
| ncsu.edu | twosocks.ces.ncsu.edu/ |
United States , Iowa , Ames